Multiple vulnerabilities in Microsoft Exchange Server
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-8265 CVE-2018-8448 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Microsoft Exchange Server Server applications / Mail servers |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Improper input validation
EUVDB-ID: #VU15257
Risk: High
CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-8265
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to an error when processing email messages within Microsoft Exchange. A remote unauthenticated attacker can send a specially crafted email, trick the victim into performing multiple actions while replying to the message and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Exchange Server: 2013 Cumulative Update 21 15.00.1395.004 - 2016 Cumulative Update 10 15.01.1531.003
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8265
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Privilege escalation
EUVDB-ID: #VU15258
Risk: Low
CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-8448
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain elevated privileges on the target system.
The vulnerability exists due to improper handling of web requests within Microsoft Exchange Outlook Web Access (OWA). A remote unauthenticated attacker can send a specially crafted email message containing a malicious link, trick the victim into clicking it and gain elevated privileges to conduct further attacks.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Exchange Server: 2013 Cumulative Update 21 15.00.1395.004 - 2016 Cumulative Update 10 15.01.1531.003
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8448
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
